Iskanje po katalogu digitalne knjižnice

Opis: NPP Krško safety analysis has been performed in such a way to allow operation with primary system average coolant temperature - Tavg inside a prescribed range, which constitute the socalled operating window. The Tavg window enables certain flexibility to select an optimum value within the Tavg range taking into account safety, operational and economical considerations. Increase of the reactor coolant temperature in general improves thermodynamic efficiency of the Pressurized Water Reactor (PWR) plant yielding to increase in the electricity production. However, higher temperature causes lower water density in the reactor core altering the neutron moderation and consequently neutron transport in the reactor. This impact on the nuclear core characteristics is investigated for the NPP Krško reactor core.
Ključne besede: pressurized water reactor, nuclear design calculations, reactor coolant temperature optimization, critical boron concentration, Nuclear Powe Plant Krško
Objavljeno v DKUM: 05.12.2023; Ogledov: 332; Prenosov: 28
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Opis: The plastic critical depth or the conventional tension crack depth has a considerable effect on the active lateral earth pressure in cohesive soils. In this paper the depth for c-ϕ soils has been evaluated in the seismic case using the stress-characteristics or slip-line method. The plastic critical depth was calculated on the basis of the theory of the stress-characteristics method and by considering the horizontal and vertical pseudo-static earthquake coefficients. The proposed solution considers the line of discontinuity in the stress-characteristics network. The earth slope, wall slope, cohesion and friction angle of the soil and the adhesion and the friction angle of the soil-wall interface were considered in the analysis as well. The results show that the plastic critical depths of this study are smaller than those of the other methods and are closer to the modified Mononobe-Okabe method. The effects of the wall and the backfill geometry, the mechanical properties of the soil and the pseudo-static coefficients were studied.
Ključne besede: plastic critical depth, stress characteristics, active lateral earth pressure, seismic
Objavljeno v DKUM: 15.06.2018; Ogledov: 1371; Prenosov: 107
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Opis: Lately, Enterprise Resource Planning (ERP) has been implemented in public organizations and organizations without competition in the marketplace. It is the ERP system that is almost as badly needed for the competitiveness and success of those organizations in the marketplace. The main reason lies in the fact that operating costs have to be reduced and the optimization of business processes is an option which nowadays is normally implemented together with new ERP. The success rate of ERP implementation remains very low with up to a 90% failure rate, as it is quoted in a lot of researches. Critical success factors (CSF) which influence successful ERP implementation are identical in all organizations. The main goal of this research is to find out the managers' impact on the critical success factors and thus their impact on the successful ERP implementation. Top management support is the most important critical success factor for successful ERP implementation, regardless of the fact whether the organization is on the market or not.
Ključne besede: enterprise resource planning, ERP, critical success factors, business process reengineering, the success rate of ERP implementation
Objavljeno v DKUM: 22.01.2018; Ogledov: 1386; Prenosov: 387
Celotno besedilo (490,60 KB)
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Opis: The study argues for the claim that a correct argumentation, i.e. a non-fallacious or good reasoning, should be the essential part of the education process, which is not always the case. The bad argumentation makes human standards and interpersonal relationships worse, and leads to the growth of social conflicts and an instable society. If the legislature, executive and judiciary branches of power did not listen to good arguments, our lives would not be as good as they are since the state might pass bad, dangerous and unjust laws. A person trained in critical thinking starting in their youth would be able to tell a difference between good and bad arguments and recognize the fact that accepting the former and dropping the latter is the only way to avoid the above mentioned negative characteristics of a society. By teaching pupils how to employ the prescribed standards of a correct argumentation using everyday examples helps them to avoid adopting certain views on the ground of their popularity, affections produced in observers, their popularity etc., which are classic examples of logical fallacies. An early training in critical thinking could make obvious the fact that, a democracy consisting among other things also in a social, racial and gender equality, after all, does not mean that sometimes left arguments win and sometimes the right ones, and that there is no difference between them in the long run.
Ključne besede: arguments, critical thinking, deduction, induction, validity
Objavljeno v DKUM: 15.12.2017; Ogledov: 1417; Prenosov: 121
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Opis: The problem of minor vehicles crossing or merging into the major stream at unsignalized priority-controlled intersections is well-known. Numerous solutions involve various assumptions concerning the major headway distributions, number of major lanes, critical gap distributions, etc. Such cases can be divided into two main groups: intersections with two streams (one major and one minor stream) and intersections with more than two streams (more than one major stream and one minor stream). At roundabouts, also at single-lane roundabouts, there are similar problems like the ones at other unsignalized priority-controlled intersections. A vehicle at the roundabout approach can only cross the pedestrian crossing when a sufficient time-gap between two pedestrians (or cyclists) is provided. A vehicle at the roundabout entries can only merge into the major stream when a sufficient gap between the two vehicles in the major stream is provided. Because of that, single-lane round-abouts can also be treated as unsignalized intersections with two major lanes: the first one in its circulatory roadway and the second one on the pedestrian crossing.
Ključne besede: unsignalized intersection, roundabouts, capacity, two major streams, pedestrians, critical gap
Objavljeno v DKUM: 06.06.2017; Ogledov: 1461; Prenosov: 210
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